| Ajay Bhargav | 732c7c2 | 2012-02-13 03:27:42 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * (C) Copyright 2012 |
| 3 | * eInfochips Ltd. <www.einfochips.com> |
| 4 | * Written-by: Ajay Bhargav <ajay.bhargav@einfochips.com> |
| 5 | * |
| 6 | * (C) Copyright 2009 |
| 7 | * Marvell Semiconductor <www.marvell.com> |
| 8 | * |
| 9 | * See file CREDITS for list of people who contributed to this |
| 10 | * project. |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU General Public License as |
| 14 | * published by the Free Software Foundation; either version 2 of |
| 15 | * the License, or (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| 25 | * MA 02110-1301 USA |
| 26 | */ |
| 27 | |
| 28 | #include <common.h> |
| 29 | #include <asm/io.h> |
| 30 | #include <usb.h> |
| 31 | #include <asm/arch/cpu.h> |
| 32 | #include <asm/arch/armada100.h> |
| 33 | #include <asm/arch/utmi-armada100.h> |
| 34 | |
| 35 | static int utmi_phy_init(void) |
| 36 | { |
| 37 | struct armd1usb_phy_reg *phy_regs = |
| 38 | (struct armd1usb_phy_reg *)UTMI_PHY_BASE; |
| 39 | int timeout; |
| 40 | |
| 41 | setbits_le32(&phy_regs->utmi_ctrl, INPKT_DELAY_SOF | PLL_PWR_UP); |
| 42 | udelay(1000); |
| 43 | setbits_le32(&phy_regs->utmi_ctrl, PHY_PWR_UP); |
| 44 | |
| 45 | clrbits_le32(&phy_regs->utmi_pll, PLL_FBDIV_MASK | PLL_REFDIV_MASK); |
| 46 | setbits_le32(&phy_regs->utmi_pll, N_DIVIDER << PLL_FBDIV | M_DIVIDER); |
| 47 | |
| 48 | setbits_le32(&phy_regs->utmi_tx, PHSEL_VAL << CK60_PHSEL); |
| 49 | |
| 50 | /* Calibrate pll */ |
| 51 | timeout = 10000; |
| 52 | while (--timeout && ((readl(&phy_regs->utmi_pll) & PLL_READY) == 0)) |
| 53 | ; |
| 54 | if (!timeout) |
| 55 | return -1; |
| 56 | |
| 57 | udelay(200); |
| 58 | setbits_le32(&phy_regs->utmi_pll, VCOCAL_START); |
| 59 | udelay(400); |
| 60 | clrbits_le32(&phy_regs->utmi_pll, VCOCAL_START); |
| 61 | |
| 62 | udelay(200); |
| 63 | setbits_le32(&phy_regs->utmi_tx, RCAL_START); |
| 64 | udelay(400); |
| 65 | clrbits_le32(&phy_regs->utmi_tx, RCAL_START); |
| 66 | |
| 67 | timeout = 10000; |
| 68 | while (--timeout && ((readl(&phy_regs->utmi_pll) & PLL_READY) == 0)) |
| 69 | ; |
| 70 | if (!timeout) |
| 71 | return -1; |
| 72 | |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | /* |
| 77 | * Initialize USB host controller's UTMI Physical interface |
| 78 | */ |
| 79 | int utmi_init(void) |
| 80 | { |
| 81 | struct armd1mpmu_registers *mpmu_regs = |
| 82 | (struct armd1mpmu_registers *)ARMD1_MPMU_BASE; |
| 83 | |
| 84 | struct armd1apmu_registers *apmu_regs = |
| 85 | (struct armd1apmu_registers *)ARMD1_APMU_BASE; |
| 86 | |
| 87 | /* Turn on 26Mhz ref clock for UTMI PLL */ |
| 88 | setbits_le32(&mpmu_regs->acgr, APB2_26M_EN | AP_26M); |
| 89 | |
| 90 | /* USB Clock reset */ |
| 91 | writel(USB_SPH_AXICLK_EN, &apmu_regs->usbcrc); |
| 92 | writel(USB_SPH_AXICLK_EN | USB_SPH_AXI_RST, &apmu_regs->usbcrc); |
| 93 | |
| 94 | /* Initialize UTMI transceiver */ |
| 95 | return utmi_phy_init(); |
| 96 | } |